Lab 6: Basic Chemistry Thermodynamics: Solve the challenge of storing renewable energy
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Expensive and low storing capacity.

Explanation:

The storing of renewable energy is a big challenge for us because this renewable energy can't be stored for a long due to expensive and low storing capacity. There are two challenges about the storing of renewable energy is that the battery are very expensive and can store very less amount of energy which makes unable to store the renewable energy. The scientists should make a storing device which is not too much expensive and has more storage capacity.

the answer is option a.